https://thecounter.org/mesquite-arizona-wild-foods-foraging-sustainable-crop/

Came here for this:

«Second, due to undeveloped and unscaled supply chains, mesquite flour costs between $12 and $24 per pound. These prices are astronomical relative to fully scaled, subsidized commodity wheat flours, which can drop to $2 a pound at big retailers. A better yardstick might be a fellow gluten-free flour, like cassava flour, generally $5 to $13 a pound.»

And this:

«“Mesquite, in terms of harvesting, as with other tree crops, it’s a little tricky and has a fairly high labor cost,” said Tim Crews from The Land Institute.»

The answer to every “why don’t we just…?” question.